This paper analyzes the proportion of Brazilian women who have sex with women, considering three time periods. The data are from a national population-based survey from 1998. The proportion of the female population who reported having any same-sex relations during their lifetime decreased from 3% to 1.7% in the previous five years and remained at 1.7% in the last year. Comparing the data by gender, the results suggest that women and men have different patterns of homosexual and heterosexual experiences over the course of their lives.